Aspect oriented service composition for telecommunication applications

This PhD dissertation investigates how to overcome the negative effects of cross cutting concerns in the development of composite service applications. It proposes a combination of dynamic aspect oriented programming with a rules driven service composition mechanism. This combination allows very flexible utilization of aspects based on run-time data. The thesis contributes a join-point model and it integrates techniques for weaving and advice definition into the underlying composition language and execution engine. A particular focus of the thesis is telecommunication applications with their unique model for utilizing heterogeneous constituent services and their severe real-time requirements. Next to its primary use for modular implementation and flexible deployment of concerns in telecommunication applications, the dissertation discusses AOP as a feature for automated management and customization of service applications. The verification of the proposed solution contributes a detailed assessment of run-time performance, including a theoretical model of the AOP implementation. It allows predicting the performance of various alternative solutions. The proposed solution for combined AOP and service composition provides properties, which directly address challenges in pervasive computing and the Internet of things. Thus, this dissertation advances beyond the telecommunication domain with results applicable to various highly relevant technical developments

The current state of E-commerce in Jordan: Applicability and future prospects

This study aimed at determining the current state of e-commerce in Jordan, as well as its future prospects. The research population consisted of all Jordanian industrial, service and/or trade companies that have a registered website. The population size was 712 companies. A total of 118 questionnaires were distributed to randomly selected companies and 95 were returned. Cronbach alpha measure was used to test the reliability of the organizational questionnaire and was calculated to be 0.80 reflecting stability and consistency of the scale and indicating the goodness of the measure. Other statistical tests were used to test the research hypotheses such as One-Sample t-test, Independent-Samples t-test, One-Way ANOVA, Chi-Square and Bivariate Correlations (Pearson). The research indicated that Jordan has adequate and efficient e-commerce requirements in general, but there is no suitable and appropriate Community Culture in order to reach E-commerce Readiness Stage. Some recommendations are then made based on research findings

Is re-farming the answer to the spectrum shortage conundrum?

Radio spectrum has become one of the engines of economic growth. However, rapid technological change, ever increasing demands for new wireless services and the nature of spectrum as a scarce resource necessitate an urgent re-examination of issues such as congestion and interference. This paper argues that the traditional administrative spectrum management approach is unlikely to overcome these issues, thereby resulting in growing technical and economic inefficiencies. As countries review their spectrum policies - a process that is generically referred to as radio spectrum policy reform - to counter these inefficiencies, modifications to the radio frequency allocations and assignments are beginning to be implemented by way of radio spectrum re-farming? This phenomenon forms the subject matter of this paper

The challenges facing road-side ‘m-Preneurs’ in leap-frogging the constraints of ICTs in DCs: A Nigerian case study

Studies have shown that the number of mobile telecommunications operators in Nigeria has been on the increase since the first Global System of Mobile Telecommunications (GSM) licence was granted to MTN (Mobile Telecommunications Network) in 2001. With the increase in mobile telecommunications operators also has come an unprecedented increase in subscriptions. According to the Nigerian Communications Commission (NCC) data, between 2001 and 2006 for instance, mobile telephone subscribers in Nigeria jumped from 266, 461 to 32.3 million indicating an increase of 12, 030.18 %